Topic 9 Human gas exchange

What is the definition of inspired air?

• Air that we breathe in

• Air that we breathe out

• Air inside our lungs

What is the definition of expired air?

• Air that we breathe in

• Air that we breathe out

• Air inside our lungs

What is the differences between inspired air and expired air?

• the amount of nitrogen in inspired air is higher than expired air

• the amount of oxygen in expired air is higher than inspired air

• temperature of inspired air is always higher than expired air

• the amount of carbon dioxide in expired air is higher than inspired air

What is the name of blood vessel that surrounds the alveoli called?

• bronchiole

• capillaries

• red blood cell

• alveolus wall

Which of the following takes place after blood pass through alveoli?

• Carbon dioxide in the blood moves into the alveolus

• Oxygen in the red blood cell moves into the alveolus

• Oxygenated blood becomes deoxygenated blood

What is the name of two main branches from the trachea (one to each lung)?

• bronchi

• alveoli

• capillaries

• bronchioles

Which of the following is not happening during inhalation?

• the diaphragm contracts

• the rib cage rises up

• expands the volume of the chest cavity

• diaphragm is relaxing

What happens when the external intercostals contract during inhalation?

• The diaphragm relaxes

• The ribs are elevated

• Pressure in the lungs increases

• The size of the thoracic cavity decreases

What happens when the external intercostals contract during inhalation?

• The diaphragm relaxes

• The ribs are elevated

• Pressure in the lungs increases

• The size of the thoracic cavity decreases

Given the following structures:
1. larynx
2. nasal cavity
3. pharynx
4. trachea
Which of the following is the correct order that air would flow during inhalation. 

• 1,2,3,4
• 2,3,1,4
• 2,1,3,4
• 4,2,3,1